Current collector head and trolley pole harp



p 1945. E. A. LABS-SON 2,385,582.

CURRENT COLLECTOR HEAD AND TRO LLEY POLE HARP Filed Dec. 13, 1943 w 'IIIIIII///III//// III In Fig. l, the resilient element l6 projects tion absorbing elements may be constructed the beyond the ends of the sleeves l4 and |5, thereby same as shown in Figs. 4, and 6 except the profilling the space between the clevis arms 1; in Fig. jecting end portions of the element l6 would be v 5, the resilient "element-.16 rojectsibeyonartl re omitted? In 'th'at;case-thefclearance between the ends of :the sleeves "l4 and I5 but cover's the ends' 5 armsiland-tongue l l maybe comparatively small of the sleeves l4 and I5 as at I6. In Fig. 1, the as in Fig. 1.

resilient element [6 does not project beyond the "I claim: 7 sleeves l4 and I5. trolley pole harp. comprising in combina- There is also a limited relative lon'gitiidin'a on'a two-part'device, one portion of the harp movement of the portions I and 2-depending upo" '10 having means for attachment to a support, the the compressive strength andithesresiliencyio the element |6 -JLLQ 1H1 Thus the vibrations and shocks to which the" other. portion having means to receive and sup- 7 collector is subjected as it travels along theover tongueatoneend, the said tongue positioned in 7 head trolley wire will be absorbed b the regimen i5 vi o f r a hinge j int, r s i nt me material l6 permitting a relative movm'ent or e fis' a p e to ld the portions against 7 the portions land ,2 within controlled and preseparation and immovablyrseeured to each p determined limits. .f of'said hinge joint whereby the portions may os- In the constructionr described and shownm cillatethrough a 1 mi e athesaid resilient Fig. 1, portions I and 2 are mechanically secured means having a central boretherethrough and it together and also insulated to a degree, but quite flexible; cable having its ends secured to the porfully whenthe vibration absorbing member shown tieris 0f the harp, t intermediate p n of h in Figs. 1 and 5are used and therefore I provide a le passing through the said'cent l b r improved means toelectrically connect portions 24 A trolley p019 harp comprising in combiriei I and 2; g tion avtwo-part device, one portion of the'harp .Iprovide'a cable or shunt I8 oriiexible time; h ns f r a a h o a up rt; the

7 preferably copper, which has one end flattened other portion having means to re ceive and'supand'attache'd to the side of the upper portion port "acurr l r, npo'r i h i je by the screws l9. The cable is 'then carried elevisat one endand the otherportion having a through the unobstructed hollow of the sleeve I1 tongue t one end; the Said n e P d in t igh th sidepf th i a is secureias H the clevis to form a hinge joint,"sepa'rate and by soldering 0r brazing orother suitable means, s aced ea s acting as a pi o old'the po t0 the ower portion 2 as at 20. H v tions against separation and immovably secured By this' construction, th shunt la i 11 t at to each part of said hinge joint ahdresilient the center of movement of the portions and 12', means secu e to each'separate' m h eby' that is on t ut m w o e the separate means aremaintained said spaced slight, therefore the bend n of the shunt due to it r l v Permit relative OSCiIIetiOYiS Of' the said movements of the'jpor tions land 2 is portions'through alimited angleythe' said'pintle very slightfln fact-practically m1; I v having a central bore therethrough and a cable The shoe 4 is not claimed specificallybutqfim having its ends gsec'u'red to the portions or the prises a. holder 2| mounted n t arcuate bearing harp, the intermediate portion of the cable pass 7 22 for oscillation. The renewable wear portion 23 ingthrou'gh the saidcentral bore!" is securedin positionbythe bolt 24; V C 35 In a trolleypolehead' comprising a portion he material of the;vibration absorbing mornhaving meansieeenneet to a Support andan' bers I3 and [3' i preferably of ubber, su other-.portionarranged to oscillate relative to the car-spring rubber, but I find that some of th first portion and having a current" collector so -called synthetic or substitute productsthereof mounted'there'on and one portion having a'clevis may be used and also, some of the so-called flexible plastics. v 1

lTher'esilieritf'member t6, which b i th bore-throughthe tongue portion and a relatively space between the sleeves 14 and Is; is securedto Smell b through the arms O the elevisiiertionv the attaching Surfaces of the sleevesby'a'surface theisaid bores having a common axis, the union-which'may' bgproduced b 'V fi S'ma bination; with the said tongue and clevis of a Well-known t th q h -a of rubber vibration absorbing pintle whereby the portions end and the other portion having'a tongue inter fitting with said'clevis end and'arelatively large manipulation and of p t plastics-and are held in predetermined relation with limited whereby the resilientmember-ltsustains'theaxial escilletien, the seidifpmtle cromprising'en Outer thrust, the {torsional and the radial forces ape and an inner sleevewith a common axis and an plied to the same. interposed .resilient member having a surface The amount of rsilintmaterialeusd 'mm' i-Im union with the oppositely disposed surfaces of'the' proved construction is very much lesstha 't sleeves whereby a limited relative rotation of usedinpriorartdevic'es; Y

' I use the wor f i in h a n; 1 setup, in the resilient member, the outer sleeve the sleeves is permitted against thetorsional force j Venient t r 't esili t vibration absorbing having an immovable surface connection with. element l 3' and I3 comprising" the part l4 the home through thetongue and an auxiliary and 16 as it functions'tohol d the portiqn j a 2 5 sleeve positioned inthe boreof theinnersleeve against separation and permits" limited-r l t and in the bore of the. clevis and having animoscillation of th portions mu like hinge T movable surfaceconnection withthe innersleeve v r i r e a .1. and withthe 'clevis whereby. the said portions are liigs. 5 and 6 show a; slight lnddifigaflbh f th held in position and havinglimited relativefoscil resilient member I3of Fig.4 in that the proj ct; lation, an elongated shunthaving its ends coningends it of the resilient element I Gare spread nected to the respective portions and passing out. g1v1ng more extensive contact surface and- 'through 'the bore of the said auxiliary sleeve help' inmaintainlngelectrical separation of -th'e whereby movement'of the shunt intermediate its portions. r

t ends is practically nil. As previously pointed out the shockand vibr' A resilient pintle comprising incombination a pair of complete metal sleeves of the same length with one sleeve positioned within and spaced from the outer sleeve and their end faces even, resilient non-metallic material interposed between the sleeves and having a surface union with each sleeve whereby relative rotation of the sleeves is resisted, the said resilient material extending beyond the ends of the sleeves and covering the end faces thereof and a third sleeve extending through the opening in the inner sleeve and projecting beyond the face of the inner sleeve at each end thereof and having a drive-fit with said inner sleeve whereby the inner and third sleeves are non-rotatable to each other but having a limited rotatable relation to the outer sleeve.

5. A resilient pintle comprising in combination a sleeve portion of resilient non-metallic material, a metal sleeve of the same length as the resilient sleeve completely encircling the resilient sleeve and having a surface union therewith, insulating material covering the end faces of the metal sleeve, a second metal sleeve completely encircled by the resilient sleeve and having a surface union therewith, the metal sleeves having a limited relative rotation about the axis of the second sleeve, and a, third metal sleeve of greater length than the second sleeve and having a driving-fit into the opening through the second metal sleeve whereby the second and third sleeves are relatively non-rotatable, the third sleeve projecting beyond and end faces of the insulating material covering the end faces, of the second sleeve for attachment to a hinge member.

6. A trolley head comprising, a harp having one portion to connect to a support, a second portion to support a current collector, a current collector pivotally mounted on the second portion to engage a trolley wire, means on each portion interfitting with the means on the other portion forming part of an oscillating joint, the said means provided with bores of different diameter having a common axis, a sleeve positioned in the bore of one portion and non-rotatable relative thereto and of substantially the same length as that of said one portion, a second sleeve spaced from the first sleeve and concentrically related thereto, a tubular third sleeve positioned in the bore of the other portion and associated with the second sleeve and non-rotatable relative to the said other portion and to the second sleeve, the said third sleeve adapted to receive a jumper cable, resilient non-metallic material interposed between the first and the second sleeves and secured thereto and projecting beyond the end faces of at least one sleeve whereby the portions may oscillate relative to each other in a vertical plane and limit the amount of said oscillation and of the current collector and insulate the flow of sound waves from passing from one portion to the other portion.

7. A trolley head comprising a harp having three portions, one portion having a tongue and means to receive a support, a second portion having a clevis interfitting with the tongue and also having means to mount a current collector thereon and a third portion securing the portions together whereby the collector may yieldingly entive movement thereto and a second metal sleeve spaced from the first metal sleeve and resilient non-metallic means positioned between the said sleeves and secured thereto whereby the sleeves may oscillate relative to each other, metallic means so secured in the bore of the other portion and so secured to the second sleeve that the second sleeve is held against movement relative to the said other portion and the said first and second portions may oscillate relative to each other in a vertical plane to yieldingly hold the current collector against the trolley wire and a jumper cable connecting said first and second harp portions.

8. A trolley pole head comprising in combination, a harp formed of two portions, one portion having means to attach it to a support and a current collector mounted on the other portion and transversely disposed resilient means securing the portions together, the last said means comprising a pair of concentric metal sleeves held in spaced relation by resilient non-metallic material which has a surface union with one surface of each sleeve whereby the said sleeves may oscillate relative to each other through a limited angle, the sleeves being so constructed and so immovably secured to the portions of the harp at their adjacent ends that one portion may oscillate relative to the other portion in a vertical plane at right angles to the axis of the resilient means to yieldingly hold the current collector in engagement with the under surface of a trolley wire and to limit the relative oscillation of the portions, and flexible metallic means extending through the resilient means along the transverse axis thereof to electrically connect the portions of the harp whereby the torsional movement in the flexible means and its resistance to the relative movement of the portions of the harp are a minimum.

9. In a trolley head comprising a harp having one portion to connect to a support and another portion having current, collector mounted thereon to engage the lower surface of a trolley wire and means on each portion interfitting with the means on the other portion forming parts of an oscillating joint having spaced side faces, the said means on each portion formed with transversely disposed bores of different diameters, the combination with the portions of a pintle secured to the portions, the pintle comprising outer and inner circumferentially complete sleeves of metal of the same length and having evenv end faces and one sleeve positioned within the other sleeve and spaced therefrom with resilient non-metallic material interposed between the sleeves and having a surface unison with each sleeve whereby extending through the opening in the inner sleeve and projecting beyond the end faces of the inner sleeve and having a drive fit with the inner sleeve, the projecting ends of the third sleeve extending into the smaller bore and secured against movement relative to the other portion, the said resilient material permitting limited movement of one harp portion relative to the other harp portion about the longitudinal axis of the third sleeve.

ERNST A. LARSSON. 

